US20160363296A1 - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- US20160363296A1 US20160363296A1 US15/182,478 US201615182478A US2016363296A1 US 20160363296 A1 US20160363296 A1 US 20160363296A1 US 201615182478 A US201615182478 A US 201615182478A US 2016363296 A1 US2016363296 A1 US 2016363296A1
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- Prior art keywords
- panel
- reflection
- light
- lighting
- lighting source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
- F21S8/032—Lighting devices intended for fixed installation of surface-mounted type the surface being a floor or like ground surface, e.g. pavement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
- F21S8/046—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures having multiple lighting devices, e.g. connected to a common ceiling base
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
- F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
- F21V23/008—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being outside the housing of the lighting device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
- F21V23/023—Power supplies in a casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0025—Combination of two or more reflectors for a single light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2101/00—Point-like light sources
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- F21Y2101/02—
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
- F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
- F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
- F21Y2105/16—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array square or rectangular, e.g. for light panels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
- F21Y2113/10—Combination of light sources of different colours
- F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
Definitions
- the present disclosure relates to lighting devices and particularly relates to a lighting device for emitting light to an illuminated surface of a target standing at an installation surface of the lighting device.
- a lighting device is introduced in a document 1 [JP 2015-002157 A].
- the lighting device (a horizontal light) of the document 1 is installed to illuminate a wall surface (a horizontal surface) as a background in such as TV studios and stages.
- Examples of the horizontal light include a lower horizontal light which is installed at a floor side, and an upper horizontal light which is installed at a ceiling side.
- the horizontal light includes a lighting source unit, a power source unit to supply power to the lighting source unit, and a supporting unit to support the lighting source unit from the power source unit.
- the lighting source unit is placed with an incline posture which a predetermined angle faces upwards so that a front surface emitting the light faces toward a diagonally upward against a wall surface.
- the lighting source unit includes a main body that is contained by a cover and a case which has an opening opened at a front surface.
- a light-emitting unit including a substrate on which plural LEDs are mounted and a reflection means are contained within the case.
- the plural LEDs are placed to form LED lines as lines along a horizontal direction on the substrate, and the LED lines are arranged to a top-and-bottom direction on the substrate.
- the reflection means includes a pair of reflection panels in the top-and-bottom direction which reflects light emitted to the top-and-bottom direction from the plural LEDs toward the opening.
- the lighting device (horizontal light) of the document 1 is installed at either a lower place (floor side) or an upper place (ceiling side) relative to the wall surface (illuminated surface of a target).
- the lighting device controls a light distribution using a pair of reflection panels placed to the top-and-bottom direction of each of LED lines so that the lighting device emits light upward from the floor when being installed at the floor side and the lighting device emits light downward from the ceiling side when being installed at the ceiling surface.
- the reflection panels of a constitution shown in the document 1 may occur an irregular illumination of the illuminated surface of the target.
- an object of the present disclosure is to propose a lighting device capable of reducing an irregular illumination to an illuminated surface of a target.
- a lighting device of an aspect in accordance with the present disclosure emits light to an illuminated surface of a target standing at an installation surface on which the lighting device is installed.
- the lighting device includes: a lighting source; a case accommodating the lighting source; and a light adjuster accommodated in the case and adjusting a path of light emitted from the lighting source.
- the lighting source includes a first lighting source and a second lighting source aligned along a predetermined direction in the case.
- the predetermined direction is a direction toward a second end of the case from a first end of the case, and a first end side is a side closer to the first end than the second end.
- the second lighting source is placed at the first end side of the first lighting source in the predetermined direction.
- the light adjuster includes a first reflection panel and a second reflection panel, both reflecting light emitted from the first lighting source, a third reflection panel and a fourth reflection panel, both reflecting light emitted from the second lighting source, a first light adjustment panel placed between the first reflection panel and the second reflection panel and a second light adjustment panel placed between the third reflection panel and the fourth reflection panel.
- a reflection surface of the first reflection panel and a reflection surface of the second reflection panel face each other in the predetermined direction.
- a reflection surface of the third reflection panel and a reflection surface of the fourth reflection panel face each other in the predetermined direction.
- the first light adjustment panel is placed between the reflection surface of the first reflection panel and the reflection surface of the second reflection panel, and shields a part of the light, which is emitted from the first lighting source to the first end side of an optical axis of the first lighting source.
- the second light adjustment panel is placed between the reflection surface of the third reflection panel and the reflection surface of the fourth reflection panel, and shields a part of the light, which is emitted from the second lighting source to the first end side of an optical axis of the second lighting source.
- FIG. 1 is an exemplary perspective view of a lighting device of an embodiment according to the present disclosure
- FIG. 2 is an exploded perspective view of a primary part of the lighting device
- FIG. 3 is a section view seen from the A 1 -A 2 of a primary part of the lighting device
- FIG. 4 is a plan view of a lighting source of the lighting device
- FIG. 5 is a perspective view of a primary part of the lighting device
- FIG. 6A is a plan view of a primary part of the lighting device
- FIG. 6B is a front view of the primary part of the above lighting device
- FIG. 7 is a layout view of a usage example of the lighting device
- FIG. 8 is a schematic view of a path of light from the lighting source of the lighting device.
- FIG. 9 is a schematic view of a path of light from a lighting source of a comparative example.
- a lighting device according to an embodiment of the present disclosure is described in details with reference to drawings.
- a wall surface horizontal surface which is a background in such as in a TV studio or a stage assumed as a target illuminated, but the target is not limited to the wall surface which is the background.
- an X-axis is defined as a predetermined direction
- one end of the X-axis is defined as a first direction X 1
- the other end of the X-axis is defined as a second direction X 2
- an axis which is perpendicular to the X-axis is defined as a Y-axis.
- One end of the Y-axis is defined as a first direction Y 1
- the other end of the Y-axis is defined as a second direction Y 2
- An axis which is perpendicular to both the X-axis and the Y-axis is defined as a Z-axis.
- One end of the Z-axis is defined as a first direction Z 1 and the other end of the Z-axis is defined as a second direction Z 2 .
- the lighting device 1 of the present embodiment is described referring to FIG. 1 to FIG. 9 .
- the lighting device 1 of the present embodiment includes a lighting source 4 , a case 2 containing the lighting source 4 , a light adjuster 3 contained within the case 2 and adjusting paths of light emitted from the lighting source 4 , plural heat sinks 5 dissipating heat generated from the lighting source 4 , and a stand holder 6 pivotally holding the case 2 .
- the case 2 includes a case 2 A and a case 2 B.
- the case 2 A includes a top cover 21 , a first panel 22 , and a second panel 23 .
- the case 2 B includes a mounting panel 24 .
- a first end of the case 2 is an end of the first direction X 1 side of the X-axis.
- a second end of the case 2 is an end of the second direction X 2 side of the X-axis.
- a first end side of the case 2 is a side which is closer to the first end of the case 2 , in spite of an inside or outside of the case 2 , than the second end of the case 2 .
- the top cover 21 is formed into a box shape opened on the second direction Y 2 side, and includes a top surface 211 formed into a rectangle shape, and a pair of side surfaces 213 and a pair of side surfaces 214 protruded toward the second direction Y 2 from a peripheral edge of the top surface 211 .
- the pair of side surfaces 213 faces each other in the X-axis.
- the pair of side surfaces 214 faces each other in the Z-axis.
- An opening 212 is opened at the top surface 211 (refer to FIG. 3 ).
- the first panel 22 is formed into a rectangular board by a translucent material, and placed at the second direction Y 2 side of the top surface 211 to cover the opening 212 of the top cover 21 (refer to FIG. 3 ).
- the second panel 23 is formed into a rectangular board colored by desired colors, and placed to partially cover the first direction X 1 side of the first panel 22 from the second direction Y 2 side (refer to FIG. 3 ).
- the mounting panel 24 as shown in FIG. 2 and FIG. 3 , includes a bottom panel 240 is formed into a rectangular board to hold the lighting source 4 on a surface of the first direction Y 1 side, and a side panel 241 protruded toward the first direction Y 1 from an peripheral edge of the bottom panel 240 .
- the mounting panel 24 is placed to cover the opening placed at the second direction Y 2 side of the top cover 21 , and the mounting panel 24 is assembled to the top cover 21 .
- the side panel 241 is screwed to the side surfaces 213 and 214 of the top cover 21 with screws.
- the lighting source 4 includes two first lighting sources 41 placed in the Z-axis on a surface of the first direction Y 1 side of the mounting panel 24 , and two second lighting sources 42 placed in the Z-axis on the surface of the first direction X 1 side of the first lighting source 41 .
- two second lighting sources 42 are placed in a first end side of the case 2 (the first direction X 1 side of the X-axis) compared with two first lighting sources 41 .
- Each of the two first lighting sources 41 includes a lighting part 410 which has plural LEDs 412 .
- each of the two first lighting sources 41 includes a circuit board 411 on which the lighting part 410 and the like are mounted, and is placed at the mounting panel 24 so that a side of the circuit board 411 on which the plural LEDs 412 are mounted is faced to the first panel 22 (first direction Y 1 ).
- Each of the two second lighting sources 42 includes a lighting part 420 has plural LEDs 422 .
- each of the two second lighting sources 42 includes a circuit board 421 on which the lighting part 420 and the like are mounted, and is placed at the mounting panel 24 so that the side of the circuit board 421 on which the plural LEDs 422 are mounted is faced to the first panel 22 (first direction Y 1 )(refer to FIG. 3 ).
- optical axes of the plural LEDs 412 and 422 are pointed to the first direction Y 1 .
- An optical axis of the first lighting source 41 indicates the optical axis of each of the plural LEDs 412 .
- an optical axis of the second lighting source 42 indicates the optical axis of each of the plural LEDs 422 .
- Each of the circuit boards 411 and 421 is assembled to the mounting panel 24 with screws.
- red LEDs 412 R and 422 R, green LEDs 412 G and 422 G, blue LEDs 412 B and 422 B, and white LEDs 412 W and 422 W are mounted on each of the circuit boards 411 and 421 .
- the circuit boards 411 and 421 shown in FIG. 4 are one example and then the location patterns and colors of the LEDs 412 and 422 are not limited to FIG. 4 .
- the light adjuster 3 includes a first reflection panel 31 , a second reflection panel 32 , a third reflection panel 33 , a fourth reflection panel 34 , a first light adjustment panel 35 , a second light adjustment panel 36 , a shielding panel 37 , a pair of side panels 38 , and a middle panel 39 .
- the first reflection panel 31 is formed into a rectangular shape extended in the Z-axis direction. An end of a shorter side of the first reflection panel 31 is placed at the second direction X 2 side of the first lighting source 41 .
- the first reflection panel 31 is placed within the case 2 so that the first reflection panel 31 inclines toward the second direction X 2 as a distance from the first lighting source 41 increases.
- the first reflection panel 31 is placed within the case 2 so that the end of the shorter side of the first reflection panel 31 is placed closer in the Y-axis direction to the first lighting source 41 compared with the other end of the shorter side of the first reflection panel 31 .
- a reflection surface 311 of the first reflection panel 31 is configured by processing a surface of the reflection surface 311 so that the emitted light reaches, through the first panel 22 , as far as possible in the second direction X 2 .
- the surface of the reflection surface 311 may be processed as a mirror-processed.
- a configuration of the surface of the reflection surface 311 may be processed.
- the second reflection panel 32 is formed into a rectangular shape extended in the Z-axis direction, and has a relatively shorter width in the Y-axis direction compared with a width of the first reflection panel 31 in the Y-axis direction. An end of a shorter side of the second reflection panel 32 is placed at the first direction X 1 side of the first lighting source 41 .
- the second reflection panel 32 is placed within the case 2 so that the second reflection panel 32 is inclined toward the first direction X 1 as a distance from the first lighting source 41 increases.
- the second reflection panel 32 is placed within the case 2 so that the end of the shorter side of the second reflection panel 32 is placed closer in the Y-axis direction to the first lighting source 41 compared with the other end of the shorter side of the second reflection panel 32 .
- the reflection surface 311 of the first reflection panel 31 and a reflection surface 321 of the second reflection panel 32 are placed to face to each other and reflect the light emitted from the first lighting source 41 to the first panel 22 .
- the third reflection panel 33 is formed into a rectangular shape extended in the Z-axis direction. An end of a shorter side of the third reflection panel 33 is placed at the second direction X 2 of the second lighting source 42 .
- the third reflection panel 33 is placed to be inclined toward the second direction X 2 as a distance from the second lighting source 42 increases.
- the third reflection panel 33 is placed within the case 2 so that the end of the shorter side of the third reflection panel 33 is placed closer in the Y-axis direction to the second lighting source 42 compared with the other end of the shorter side of the third reflection panel 33 .
- the fourth reflection panel 34 is formed into a rectangular shape extended in the Z-axis direction and has a width in the Y-axis direction longer than a width of the third reflection panel 33 in the Y-axis direction. An end of a shorter side of the fourth reflection panel 34 is placed at the first direction X 1 side of the second lighting source 42 .
- the fourth reflection panel 34 is placed to be inclined toward the first direction X 1 as a distance from the second lighting source 42 increases.
- the fourth reflection panel 34 is placed within the case 2 so that the end of the shorter side of the fourth reflection panel 34 is placed closer in the Y-axis direction to the second lighting source 42 compared with the other end of the shorter side of the four reflection panel 34 .
- the reflection surface 331 of the third reflection panel 33 and the reflection surface 341 of the fourth reflection panel 34 are faced to each other, and the reflection surface 331 and the reflection surface 341 reflect, to the first panel 22 , the light emitted from the lighting source 42 .
- an angle against the reflection surface 331 of the third reflection panel 33 and a length of a width in the Y-axis direction of the reflection surface 341 of the fourth reflection panel 34 are adjusted so that the emitted light reaches, through the first panel 22 , as far as possible in the second direction X 2 .
- the first light adjustment panel 35 is formed into a rectangular shape extended in the Z-axis direction.
- the both surfaces of the first light adjustment panel 35 are made to shielding surfaces 351 and 352 .
- the shielding surface 351 is colored with black to absorb the light as a light absorbing surface.
- the shielding surface 352 is colored with white to progress the higher reflectance compared with the shielding surface 351 .
- the first light adjustment panel 35 is placed between the reflection surface 311 of the first reflection panel 31 and the reflection surface 321 of the second reflection panel 32 .
- the first light adjustment panel 35 is placed near the first direction X 1 side of the middle in the X-axis direction of the first lighting source 41 .
- the first light adjustment panel 35 is placed within the case 2 so that the shielding surface 351 is faced up to the first lighting source 41 .
- the first light adjustment panel 35 is placed so that an end of a shorter side of the first light adjustment panel 35 is located at the first direction Y 1 side which is closer than an end in the second direction Y 2 of the second reflection panel 32 .
- the first light adjustment panel 35 is place to incline toward the second direction X 2 as a distance from the first lighting source 41 increases.
- the first light adjustment panel 35 is placed within the case 2 so that the end of the shorter side of the first light adjustment panel 35 is placed closer in the Y-axis direction to the first lighting source 41 compared with the other end of the shorter side of the first light adjustment panel 35 .
- the second light adjustment panel 36 is formed into a rectangular shape extended in the Z-axis direction.
- the both surface of the second light adjustment panel 36 are made to shielding surfaces 361 and 362 .
- the shielding surface 361 is colored with black to absorb the light as a light absorbing surface.
- the shielding surface 362 is colored with white to progress the higher reflectance compared with the shielding surface 361 .
- the second light adjustment panel 36 is placed between the reflection surface 331 of the third reflection panel 33 and the reflection surface 341 of the fourth reflection panel 34 .
- the second light adjustment panel 36 is placed near the first direction X 1 side of the middle in the X-axis direction of the second lighting source 42 .
- the second light adjustment panel 36 is placed within the case 2 so that the shielding surface 361 is faced up to the second lighting source 42 .
- the second light adjustment panel 36 is placed so that an end of a shorter side of the second light adjustment panel 36 is located closer to the first direction Y 1 side than an end in the second direction Y 2 of the fourth reflection panel 34 .
- the second light adjustment panel 36 is placed to incline toward the second direction X 2 as a distance from the second lighting source 42 increases.
- the second light adjustment panel 36 is placed within the case 2 so that the end of the shorter side of the second light adjustment panel 36 is placed closer in the Y-axis direction to the second lighting source 42 compared with the other end of the shorter side of the second light adjustment panel 36 .
- the shielding panel 37 is formed into a rectangular shape extended in the Z-axis direction and placed between the second reflection panel 32 and the third reflection panel 33 .
- the shielding panel 37 includes a shielding surface 371 shielding a part of the light emitted from the first lighting source 41 and a shielding surface 372 shielding a part of the light emitted from the second lighting source 42 at each of both surfaces respectably.
- the shielding surfaces 371 and 372 of the shielding panel 37 are colored with black to absorb the light as light absorbing surfaces.
- Each of a pair of side panels 38 of the light adjuster 3 includes a pair of holding parts 381 formed into a rectangle board shape and a mounting part 382 formed for being bent perpendicular at the first direction Z 1 or the second direction Z 2 from the second direction Y 2 side of each of the pair of holding units 381 .
- Each of the pair of holding units 381 includes slits to pass through and hold the each of both edges in the Z-axis direction of the first reflection panel 31 , the second reflection panel 32 , the third reflection panel 33 , the fourth reflection panel 34 (refer to FIG. 1 and FIG. 2 ).
- each of the pair of holding parts 381 includes slits to pass through and hold the each of both edges in the Z-axis direction of the first light adjustment panel 35 , the second light adjustment panel 36 , and the shielding panel 37 (refer to FIG. 1 and FIG. 2 ).
- Each of the pair of the holding parts 381 is formed into a reflection surface so that surfaces faced to each other in the Z-axis direction reflect the light emitted from the lighting source 4 .
- the mounting part 382 is assembled to a surface of the first direction Y 1 side of the mounting panel 24 with screws.
- the middle panel 39 is formed into a rectangle board shape, and includes a pair of mounting chips 391 that both edges of the middle panel 39 in the X-axis direction is bent perpendicular to the first direction Z 1 .
- Each of the pair of mounting chips 391 is assembled to a surface of the first direction Y 1 side of the mounting panel 24 with screws.
- the middle panel 39 is placed between two first lighting sources 41 along to the Z-axis direction and between two second lighting sources 42 along to the Z-axis direction.
- the both surfaces of the middle panel 39 are formed into reflection surfaces.
- the middle panel 39 has slits to pass through the first reflection panel 31 , the second reflection panel 32 , the third reflection panel 33 , the fourth reflection panel 34 , the first light adjustment panel 35 , the second light adjustment panel 36 , and the shielding panel 37 .
- Each of plural heat sinks 5 includes a base 51 formed into a rectangle board shape by a metal such as an aluminum, and plural radiating fins 52 formed into a rectangle board shape at a surface of the second direction Y 2 side of the base 51 .
- a metal such as an aluminum
- plural radiating fins 52 formed into a rectangle board shape at a surface of the second direction Y 2 side of the base 51 .
- the stand holder 6 includes a box 61 containing such as a power source 611 and a controller 612 , and a pair of supporting panels 62 .
- the power source 611 converts from electrical power supplied from a commercial power supply to electrical power for supplying to the lighting source 4 .
- the controller 612 dims and arranges colors by adjusting electrical power supplying to the LEDs 412 and 422 .
- Each of the pair of supporting panels 62 is connected to the both edges of the box 61 in the Z-axis direction and holds the case 2 being able to change an angle of the case 2 with knob bolts 63 .
- FIG. 1 when the lighting device 1 is installed at a floor 101 , front, rear, left, right, top, and bottom are defined in FIG. 1 .
- the Z-axis direction shown in FIG. 1 is defined as the right-left direction, the first direction Z 1 points to the right, and the second direction Z 2 points to the left.
- a top-and-bottom direction and a front-and-rear directions are defined when the lighting device 1 is installed at the floor 101 in FIG. 7 to FIG. 9 .
- the lighting device 1 of the present embodiment is installed on the floor 101 as an installation surface on which a wall surface (illuminated surface of the target 10 ) 100 is installed.
- the lighting device 1 is installed on the floor 101 so that the Y-axis direction, which is same as optical axes OA 1 and OA 2 , crosses to a standing direction (the top-and-bottom direction) of the wall surface 100 .
- the front-and-rear direction's distance between the second lighting source 42 and wall surface 100 is shorter than the front-and-rear direction's distance between the first lighting source 41 and the wall surface 100 .
- the lighting device 1 may be installed at a predetermined location in the front-and-rear direction, and the angle of the optical axes OA 1 and OA 2 against the floor 101 may be changed by using knob bolts 63 .
- the standing direction is a direction which is along to the illuminated surface and crossing to the installation surface of the lighting device 1 .
- the standing direction is the direction which is along to the wall surface 100 and crossing to the floor 101 when the lighting device 1 is installed at the floor 101 .
- the standing direction is a direction which is along to the wall surface 100 and crossing to the ceiling.
- a dashed line Il represents an illumination curve Il when a lighting device includes none of the first light adjustment panel 35 , the second light adjustment panel 36 , or the shielding panel 37 (a comparative example).
- a distance between the wall surface 100 and the illumination curve I 1 represents an intensity of illuminance (an illuminance D 1 ).
- a solid line I 2 represents an illumination curve I 2 when the lighting device 1 includes the first light adjustment panel 35 , the second light adjustment panel 36 , and the shielding panel 37 (the lighting device 1 of the present embodiment).
- the distance between the wall surface 100 and the illumination curve I 2 represents an intensity of illuminance (an illuminance D 2 ).
- FIG. 8 shows the paths of the light (of the present embodiment) when the lighting device 1 includes the first light adjustment panel 35 , the second light adjustment panel 36 , and the shielding panel 37 .
- the shielding surface 351 of the first light adjustment panel 35 and the shielding surface 361 of the second light adjustment panel 36 are formed to have a low reflectance and absorb the light emitted from the lighting source 4 .
- the shielding surface 352 of the first light adjustment panel 35 and the shielding surface 362 of the second light adjustment panel 36 are formed to have a high reflectance and reflect the light emitted from the lighting source 4 .
- the optical axis OA 1 shows an optical axis of the lighting part 410 of the first lighting source 41
- the optical axis OA 2 shows an optical axis of the lighting part 420 of the second lighting source 42 .
- the light traveled to the direction inclining upward and pointing to the first light adjustment panel 35 from the LEDs 412 of the first lighting source 41 hits the shielding surface 351 of the first light adjustment panel 35 , and is shielded.
- the light traveled to the front direction from the LEDs 412 of the first lighting source 41 is reflected by the reflection surface 321 of the second reflection panel 32 , reflected by the shielding surface 352 of the first light adjustment panel 35 , and travels toward the first panel 22 .
- the light traveled to the direction inclining frontward and pointing to the shielding panel 37 from the LEDs 412 of the first lighting source 41 is shielded by the shielding surface 371 of the shielding panel 37 .
- the light traveled to the direction inclining rearward and pointing to the first reflection panel 31 from the LEDs 412 of the first lighting source 41 is reflected by the reflection surface 311 of the first reflection panel 31 and travels toward the first panel 22 .
- the light traveled to the direction inclining upward from the LEDs 412 of the first lighting source 41 travels upward.
- the light traveled to the direction inclining upward and pointing to the second light adjustment panel 36 from the LEDs 422 of the second lighting source 42 hits the shielding surface 361 of the second light adjustment panel 36 , and is shielded.
- the light traveled to the front direction from the LEDs 422 of the second lighting source 42 is reflected by the reflection surface 341 of the fourth reflection panel 34 , reflected by the shielding surface 362 of the second light adjustment panel 36 , and travels toward the first panel 22 .
- the light traveled to the direction inclining upward and pointing to the third reflection panel 33 from the LEDs 422 of the second lighting source 42 is reflected by the reflection surface 331 of the third reflection panel 33 , and shielded by the shielding surface 372 of the shielding panel 37 .
- the light traveled to the direction inclining rearward and pointing to the third reflection panel 33 from the LEDs 422 of the second lighting source 42 is reflected by the reflection surface 331 of the third reflection panel 33 and travels toward the first panel 22 .
- the light traveled upward from the LEDs 422 of the second lighting source 42 travels upward.
- a comparative example as shown in FIG. 9 comparing with the paths of the light as shown in FIG. 8 , there exist more optical paths of the light emitted to the front side of the optical axes OA 1 and OA 2 from plural LEDs 412 of the first lighting source 41 . Besides, the intensity of an illumination at a place closer to the first lighting source 41 of the wall surface 100 is stronger by the light emitted from the first lighting source 41 . Moreover, in the comparative example, comparing with the paths of the light as shown in FIG. 8 , there exist more the optical paths of the light emitted to front side of the optical axis OA 2 from the plural LEDs 422 of the second lighting source 42 .
- the intensity of an illumination at a place closer to the second lighting source 42 of the wall surface 100 is stronger by the light emitted from the second lighting source 42 .
- the intensity of an illumination D 1 at a lower part of the wall surface 100 is more likely to be stronger and the intensity of an illumination D 1 at higher part of the wall surface 100 is more likely to be weaker (refer to FIG. 7 ).
- the shielding surface 351 of the first light adjustment panel 35 shields a part of the light emitted from the plural LEDs 412 of the first lighting source 41 to the front side (the first end side) of the optical axis OA 1 .
- the shielding surface 361 of the second light adjustment panel 36 shields a part of the light emitted from the plural LEDs 422 of the second lighting source 42 to the front side (the first end side) of the optical axis OA 2 .
- the shielding surfaces 371 and 372 of the shielding panel 37 shield a part of the light emitted to a lower part of the wall surface 100 .
- the shielding surface 352 of the first light adjustment panel 35 and the shielding surface 362 of the second light adjustment panel 36 reflect a part of the light emitted from the first lighting source 41 and the second lighting source 42 , and thus, when the lighting device 1 emits the light to the wall surface 100 , an irregular illumination on the wall surface 100 can be reduced.
- the shielding surface 352 of the first light adjustment panel 35 and the shielding surface 362 of the second light adjustment panel 36 are configured to reflect a part of the light emitted from the first lighting source 41 and the second lighting source 42 . A part of the light to illuminating the wall surface is reflected by the shielding surface 352 of the first light adjustment panel 35 and the shielding surface 362 of the second light adjustment panel 36 . Therefore, an irregular illumination of the wall surface 100 can be reduced.
- the intensity of the illumination D 2 of a lower side of the wall surface 100 is reduced by the shielding surface 351 of the first light adjustment panel 35 , the shielding surface 361 of the second light adjustment panel 36 , and the shielding panel 37 .
- the lighting device 1 emits light to the wall surface 100 so that an illuminance distribution of the wall surface 100 in the top-and-bottom direction is more uniform by the shielding surface 352 of the first light adjustment panel 35 and the shielding surface 362 of the second light adjustment panel 36 .
- the intensity of the illumination D 2 of the light emitted to the wall surface 100 becomes more uniform with the shielding surface 352 of the first light adjustment panel 35 and the shielding surface 362 of the second light adjustment panel 36 .
- the angle of the case 2 can be changed and the lighting device 1 is able to emit light in the top-and-bottom direction to a far place of the wall surface 100 , even if the lighting device 1 may be installed at a place different from the installation place shown in FIG. 7 in the front-and-rear direction.
- the lighting device 1 of the present embodiment may be installed at a ceiling instead of the floor 101 by, for example, being suspended.
- the lighting source 4 may include only one first lighting source 41 and only one second lighting source 42 . Further, the lighting source 4 may include three or more first lighting sources 41 and three or more second lighting sources 42 . Besides, shapes and constitutions of the circuit board 411 of the first lighting source 41 and the circuit board 421 of the second lighting source 42 are not limited to those of the present embodiment.
- Widths of the top-and-bottom direction, shapes, and inclination angles of the first reflection panel 31 , the second reflection panel 32 , the third reflection panel 33 , and the fourth reflection panel 34 are not limited to those of the present embodiment. Also, widths of the top-and-bottom direction, shapes, and inclination angles of the first light adjustment panel 35 , the second light adjustment panel 36 , and the shielding panel 37 are not limited to those of the present embodiment.
- the manner of settings of the reflectance of the shielding surfaces 351 and 352 of the first light adjustment panel 35 and the shielding surface 361 and 362 of the second light adjustment panel 36 are not limited to the manners of setting of the reflectance of the present embodiment.
- the lighting device 1 preferably includes the first light adjustment panel 35 in which the reflectance of the shielding surfaces 351 and 352 are set appropriately in accordance with a place and an environment of the installation.
- the lighting device 1 preferably includes the second light adjustment panel 36 in which the reflectance of the shielding surfaces 361 and 362 are adjusted appropriately in accordance with a place and an environment of the installation.
- the reflectance of the shielding surfaces 351 and 352 of the first light adjustment panel 35 and the shielding surfaces 361 and 362 of the second light adjustment panel 36 are not only adjusted by color of surfaces, but may be adjusted by processing the surfaces, such as a mirror surface processing. In additionally, the reflectance of the shielding surfaces 351 and 352 of the first light adjustment panel 35 and the shielding surfaces 361 and 362 of the second light adjustment panel 36 may be adjusted by processing the surfaces, such as a mirror surface processing, instead of being adjusted by color of surfaces.
- the manners of adjustment of the reflectance of the shielding surfaces 371 and 372 of the shielding panel 37 are not limited to the manners of adjustment of the reflectance of the present embodiment.
- the lighting device 1 preferably includes the shielding panel 37 in which the reflectance of the shielding surfaces 371 and 372 are adjusted appropriately in accordance with a place and an environment of the installation.
- the reflectance of the shielding surfaces 371 and 372 of the shielding panel 37 are not only adjusted by color of surfaces, but may be adjusted by processing the surfaces, such as a mirror surface processing.
- the reflectance of the shielding surfaces 371 and 372 of the shielding panel 37 may be adjusted by processing the surfaces, such as a mirror surface processing, instead of being adjusted by color of surfaces.
- the materials and shapes of the heat sinks 5 are not limited to those of the present embodiment.
- the lighting device 1 of the present embodiment emits light to the illuminated surface (wall surface 100 ) of the target 10 standing at the installation surface (floor 101 ) on which the lighting device 1 is installed.
- the lighting device 1 includes: the lighting source 4 ; the case 2 containing the lighting source 4 ; and the light adjuster 3 contained in the case 2 and adjusting a path of light emitted from the lighting source 4 .
- the lighting source 4 includes the first lighting source 41 and the second lighting source 42 aligned along the predetermined direction (X direction) in the case 2 .
- the second lighting source 42 is placed at a side of the first lighting source 41 at the predetermined side (X 1 side) of the predetermined direction (X direction).
- the light adjuster 3 includes the first reflection panel 31 and the second reflection panel 32 reflecting light emitted from the first lighting source 41 , and the third reflection panel 33 and the fourth reflection panel 34 reflecting light emitted from the second lighting source 42 .
- the light adjuster 3 further includes the first light adjustment panel 35 placed between the first reflection panel 31 and the second reflection panel 32 , and the second light adjustment panel 36 placed between the third reflection panel 33 and the fourth reflection panel 34 .
- Each of the reflection surface 311 of the first reflection panel 31 and the reflection surface 321 of the second reflection panel 32 are located facing each other in the predetermined direction (X direction).
- Each of the reflection surface 331 of the third reflection panel 33 and the reflection surface 341 of the fourth reflection panel 34 are located facing each other in the predetermined direction (X direction).
- the first light adjustment panel 35 is placed between the reflection surface 311 of the first reflection panel 31 and the reflection surface 321 of the second reflection panel 32 , and shields a part of the light emitted from the first lighting source 41 to the predetermined side (front side) of an optical axis OA 1 of the first lighting source 41 .
- the second light adjustment panel 36 is placed between the reflection surface 331 of the third reflection panel 33 and the reflection surface 341 of the fourth reflection panel 34 , and shields a part of the light emitted from the second lighting source 42 to the predetermined side of an optical axis OA 2 of the second lighting source 42 .
- the lighting device 1 of the present embodiment emits light to the illuminated surface (wall surface) 100 of the target 10 standing at the installation surface (floor) 101 on which the lighting device 1 is installed.
- the lighting device 1 includes: the lighting source 4 ; the case 2 accommodating the lighting source 4 ; and the light adjuster 3 accommodated in the case 2 and adjusting a path of light emitted from the lighting source 4 .
- the lighting source 4 includes the first lighting source 41 and the second lighting source 42 aligned along the predetermined direction (X-axis direction) in the case 2 .
- the predetermined direction is the direction toward the second end of the case 2 from the first end of the case 2
- the first end (the first direction) X 1 side is a side closer to the first end than the second end.
- the second lighting source 42 is placed at the first end (the first direction) X 1 side of the first lighting source 41 in the predetermined direction (X-axis direction).
- the light adjuster 3 includes the first reflection panel 31 and the second reflection panel 32 both reflecting light emitted from the first lighting source 41 , and the third reflection panel 33 and the fourth reflection panel 34 both reflecting light emitted from the second lighting source 42 .
- the light adjuster 3 further includes the first light adjustment panel 35 placed between the first reflection panel 31 and the second reflection panel 32 , and the second light adjustment panel 36 placed between the third reflection panel 33 and the fourth reflection panel 34 .
- the reflection surface 311 of the first reflection panel 31 and the reflection surface 321 of the second reflection panel 32 face each other in the predetermined direction (X-axis direction).
- the reflection surface 331 of the third reflection panel 33 and the reflection surface 341 of the fourth reflection panel 34 face each other in the predetermined direction (X-axis direction).
- the first light adjustment panel 35 is placed between the reflection surface 311 of the first reflection panel 31 and the reflection surface 321 of the second reflection panel 32 , and shields a part of the light, which is emitted from the first lighting source 41 to the first end (the first direction) X 1 side of the optical axis OA 1 of the first lighting source 41 .
- the second light adjustment panel 36 is placed between the reflection surface 331 of the third reflection panel 33 and the reflection surface 341 of the fourth reflection panel 34 , and shields a part of the light, which is emitted from the second lighting source 42 to the first end (the first direction) X 1 side of the optical axis OA 2 of the second lighting source 42 .
- the lighting device 1 of the present embodiment is configured as described above, and therefore an irregular illumination to the illuminated surface (wall surface) 100 of the target 10 can be reduced.
- both surfaces of the first light adjustment panel 35 preferably are shielding surfaces 351 and 352 to shield light.
- Both surfaces of the second light adjustment panel 36 preferably are shielding surfaces 361 and 362 to shield light.
- the lighting device 1 can reduce the irregular illumination in the wall surface 100 while decreasing the light emitted to the part of the wall surface 100 closer to the floor 101 .
- the first light adjustment panel 35 is preferably placed so that the first surface (shielding surface) 351 faces to the first lighting source 41 .
- the first surface 351 of the first light adjustment panel 35 is preferably a light absorbing surface having the higher absorptance than the second surface (shielding surface) 352 , which is opposite to the first surface, of the first light adjustment panel 35 .
- the second surface 352 of the first light adjustment panel 35 is preferably the light reflecting surface having the higher reflectance than the first surface 351 of the first light adjustment panel 35 .
- the second light adjustment panel 36 is preferably placed so that the first surface (shielding surface) 361 faces to the second lighting source 42 .
- the first surface 361 of the second light adjustment panel 36 is the light absorbing surface having the higher absorptance than the second surface (shielding surface) 362 , which is opposite to the first surface, of the second light adjustment panel 36 .
- the second surface 362 of the second light adjustment panel 36 is preferably the light reflecting surface having the higher reflectance than the first surface 361 of the second light adjustment panel 36 .
- the lighting device 1 of the present embodiment preferably further includes the shielding panel 37 placed between the second reflection panel 32 and the third reflection panel 33 . Both surfaces of the surfaces of the shielding panel 37 are the shielding surfaces 371 and 372 to shield light.
- the lighting device 1 of the present embodiment can decrease the light illuminating the part of the wall surface 100 closer to the floor 101 .
- the predetermined direction (X direction) is preferably a direction that crosses to the standing-direction (top-and-bottom direction) of the target 10 (wall surface 100 ).
- the predetermined direction is preferably a direction that crosses to the standing-direction (top-and-bottom direction) of the target 10 which is a direction along to the illuminated surface (wall surface) 100 and crossing to the installation surface (floor) 101 when the lighting device 1 is installed at the installation surface (floor) 101 .
- the lighting device 1 of the present embodiment can reduce the irregular illuminations of the wall surface 100 .
- each of the first lighting source 41 and the second lighting source 42 preferably includes plural LEDs 412 and 422 respectably.
- the lighting device 1 of the present embodiment can emit the light with desired colors to the wall surface 100 .
- the lighting device 1 of the present embodiment preferable further includes the power source 611 for supplying electrical power to the lighting source 4 , and the stand holder 6 containing the power source 611 and pivotally holding the case 2 .
- the lighting device 1 of the present embodiment can emits the light to the place far along to the wall surface 100 from the installed place.
Abstract
Description
- The application is based upon and claims the benefit of priority of Japanese Patent Application No. 2015-120363, filed on Jun. 15, 2015, the entire contents of which are incorporated herein by reference.
- The present disclosure relates to lighting devices and particularly relates to a lighting device for emitting light to an illuminated surface of a target standing at an installation surface of the lighting device.
- As a conventional example, a lighting device is introduced in a document 1 [JP 2015-002157 A]. The lighting device (a horizontal light) of the
document 1 is installed to illuminate a wall surface (a horizontal surface) as a background in such as TV studios and stages. Examples of the horizontal light include a lower horizontal light which is installed at a floor side, and an upper horizontal light which is installed at a ceiling side. The horizontal light includes a lighting source unit, a power source unit to supply power to the lighting source unit, and a supporting unit to support the lighting source unit from the power source unit. The lighting source unit is placed with an incline posture which a predetermined angle faces upwards so that a front surface emitting the light faces toward a diagonally upward against a wall surface. - The lighting source unit includes a main body that is contained by a cover and a case which has an opening opened at a front surface. A light-emitting unit including a substrate on which plural LEDs are mounted and a reflection means are contained within the case. The plural LEDs are placed to form LED lines as lines along a horizontal direction on the substrate, and the LED lines are arranged to a top-and-bottom direction on the substrate. The reflection means includes a pair of reflection panels in the top-and-bottom direction which reflects light emitted to the top-and-bottom direction from the plural LEDs toward the opening.
- Incidentally, the lighting device (horizontal light) of the
document 1 is installed at either a lower place (floor side) or an upper place (ceiling side) relative to the wall surface (illuminated surface of a target). The lighting device controls a light distribution using a pair of reflection panels placed to the top-and-bottom direction of each of LED lines so that the lighting device emits light upward from the floor when being installed at the floor side and the lighting device emits light downward from the ceiling side when being installed at the ceiling surface. - However, the reflection panels of a constitution shown in the
document 1 may occur an irregular illumination of the illuminated surface of the target. - In view of the above insufficiency, an object of the present disclosure is to propose a lighting device capable of reducing an irregular illumination to an illuminated surface of a target.
- A lighting device of an aspect in accordance with the present disclosure emits light to an illuminated surface of a target standing at an installation surface on which the lighting device is installed. The lighting device includes: a lighting source; a case accommodating the lighting source; and a light adjuster accommodated in the case and adjusting a path of light emitted from the lighting source. The lighting source includes a first lighting source and a second lighting source aligned along a predetermined direction in the case. The predetermined direction is a direction toward a second end of the case from a first end of the case, and a first end side is a side closer to the first end than the second end. The second lighting source is placed at the first end side of the first lighting source in the predetermined direction. The light adjuster includes a first reflection panel and a second reflection panel, both reflecting light emitted from the first lighting source, a third reflection panel and a fourth reflection panel, both reflecting light emitted from the second lighting source, a first light adjustment panel placed between the first reflection panel and the second reflection panel and a second light adjustment panel placed between the third reflection panel and the fourth reflection panel. A reflection surface of the first reflection panel and a reflection surface of the second reflection panel face each other in the predetermined direction. A reflection surface of the third reflection panel and a reflection surface of the fourth reflection panel face each other in the predetermined direction. The first light adjustment panel is placed between the reflection surface of the first reflection panel and the reflection surface of the second reflection panel, and shields a part of the light, which is emitted from the first lighting source to the first end side of an optical axis of the first lighting source. The second light adjustment panel is placed between the reflection surface of the third reflection panel and the reflection surface of the fourth reflection panel, and shields a part of the light, which is emitted from the second lighting source to the first end side of an optical axis of the second lighting source.
- The figures depict one or more implementation in accordance with the present teaching, by way of example only, not by way of limitations.
-
FIG. 1 is an exemplary perspective view of a lighting device of an embodiment according to the present disclosure; -
FIG. 2 is an exploded perspective view of a primary part of the lighting device; -
FIG. 3 is a section view seen from the A1-A2 of a primary part of the lighting device; -
FIG. 4 is a plan view of a lighting source of the lighting device; -
FIG. 5 is a perspective view of a primary part of the lighting device; -
FIG. 6A is a plan view of a primary part of the lighting device,FIG. 6B is a front view of the primary part of the above lighting device; -
FIG. 7 is a layout view of a usage example of the lighting device; -
FIG. 8 is a schematic view of a path of light from the lighting source of the lighting device; and -
FIG. 9 is a schematic view of a path of light from a lighting source of a comparative example. - Hereinafter, a lighting device according to an embodiment of the present disclosure is described in details with reference to drawings. However, in the following embodiment, a wall surface (horizontal surface) which is a background in such as in a TV studio or a stage assumed as a target illuminated, but the target is not limited to the wall surface which is the background. Note that, unless otherwise noted in the following explanation, in
FIG. 1 , an X-axis is defined as a predetermined direction, one end of the X-axis is defined as a first direction X1, and the other end of the X-axis is defined as a second direction X2. Besides, an axis which is perpendicular to the X-axis is defined as a Y-axis. One end of the Y-axis is defined as a first direction Y1, and the other end of the Y-axis is defined as a second direction Y2. An axis which is perpendicular to both the X-axis and the Y-axis is defined as a Z-axis. One end of the Z-axis is defined as a first direction Z1 and the other end of the Z-axis is defined as a second direction Z2. - The
lighting device 1 of the present embodiment is described referring toFIG. 1 toFIG. 9 . - As shown in
FIG. 1 , thelighting device 1 of the present embodiment includes alighting source 4, acase 2 containing thelighting source 4, alight adjuster 3 contained within thecase 2 and adjusting paths of light emitted from thelighting source 4,plural heat sinks 5 dissipating heat generated from thelighting source 4, and astand holder 6 pivotally holding thecase 2. - As shown in
FIG. 2 , thecase 2 includes acase 2A and acase 2B. Thecase 2A includes atop cover 21, afirst panel 22, and asecond panel 23. Thecase 2B includes amounting panel 24. Note that, a first end of thecase 2 is an end of the first direction X1 side of the X-axis. A second end of thecase 2 is an end of the second direction X2 side of the X-axis. Besides, a first end side of thecase 2 is a side which is closer to the first end of thecase 2, in spite of an inside or outside of thecase 2, than the second end of thecase 2. - The
top cover 21 is formed into a box shape opened on the second direction Y2 side, and includes atop surface 211 formed into a rectangle shape, and a pair ofside surfaces 213 and a pair ofside surfaces 214 protruded toward the second direction Y2 from a peripheral edge of thetop surface 211. The pair ofside surfaces 213 faces each other in the X-axis. The pair ofside surfaces 214 faces each other in the Z-axis. Anopening 212 is opened at the top surface 211 (refer toFIG. 3 ). Thefirst panel 22 is formed into a rectangular board by a translucent material, and placed at the second direction Y2 side of thetop surface 211 to cover the opening 212 of the top cover 21 (refer toFIG. 3 ). Thesecond panel 23 is formed into a rectangular board colored by desired colors, and placed to partially cover the first direction X1 side of thefirst panel 22 from the second direction Y2 side (refer toFIG. 3 ). Themounting panel 24, as shown inFIG. 2 andFIG. 3 , includes abottom panel 240 is formed into a rectangular board to hold thelighting source 4 on a surface of the first direction Y1 side, and aside panel 241 protruded toward the first direction Y1 from an peripheral edge of thebottom panel 240. The mountingpanel 24 is placed to cover the opening placed at the second direction Y2 side of thetop cover 21, and the mountingpanel 24 is assembled to thetop cover 21. In other words, theside panel 241 is screwed to the side surfaces 213 and 214 of thetop cover 21 with screws. - The
lighting source 4, as shown inFIG. 2 andFIG. 4 , includes twofirst lighting sources 41 placed in the Z-axis on a surface of the first direction Y1 side of the mountingpanel 24, and twosecond lighting sources 42 placed in the Z-axis on the surface of the first direction X1 side of thefirst lighting source 41. In other words, twosecond lighting sources 42 are placed in a first end side of the case 2 (the first direction X1 side of the X-axis) compared with two first lighting sources 41. Each of the twofirst lighting sources 41 includes alighting part 410 which hasplural LEDs 412. Besides, each of the twofirst lighting sources 41 includes acircuit board 411 on which thelighting part 410 and the like are mounted, and is placed at the mountingpanel 24 so that a side of thecircuit board 411 on which theplural LEDs 412 are mounted is faced to the first panel 22 (first direction Y1). Each of the twosecond lighting sources 42 includes alighting part 420 hasplural LEDs 422. Besides, each of the twosecond lighting sources 42 includes acircuit board 421 on which thelighting part 420 and the like are mounted, and is placed at the mountingpanel 24 so that the side of thecircuit board 421 on which theplural LEDs 422 are mounted is faced to the first panel 22 (first direction Y1)(refer toFIG. 3 ). Note that, optical axes of theplural LEDs first lighting source 41 indicates the optical axis of each of theplural LEDs 412. Besides, an optical axis of thesecond lighting source 42 indicates the optical axis of each of theplural LEDs 422. Each of thecircuit boards panel 24 with screws. - As shown in
FIG. 4 ,red LEDs green LEDs blue LEDs white LEDs circuit boards circuit boards FIG. 4 are one example and then the location patterns and colors of theLEDs FIG. 4 . - The
light adjuster 3, as shown inFIG. 3 andFIG. 5 , includes afirst reflection panel 31, asecond reflection panel 32, athird reflection panel 33, afourth reflection panel 34, a firstlight adjustment panel 35, a secondlight adjustment panel 36, a shieldingpanel 37, a pair ofside panels 38, and amiddle panel 39. - The
first reflection panel 31, as shown inFIG. 3 andFIG. 6A , is formed into a rectangular shape extended in the Z-axis direction. An end of a shorter side of thefirst reflection panel 31 is placed at the second direction X2 side of thefirst lighting source 41. Thefirst reflection panel 31 is placed within thecase 2 so that thefirst reflection panel 31 inclines toward the second direction X2 as a distance from thefirst lighting source 41 increases. Thefirst reflection panel 31 is placed within thecase 2 so that the end of the shorter side of thefirst reflection panel 31 is placed closer in the Y-axis direction to thefirst lighting source 41 compared with the other end of the shorter side of thefirst reflection panel 31. Areflection surface 311 of thefirst reflection panel 31 is configured by processing a surface of thereflection surface 311 so that the emitted light reaches, through thefirst panel 22, as far as possible in the second direction X2. For example, the surface of thereflection surface 311 may be processed as a mirror-processed. A configuration of the surface of thereflection surface 311 may be processed. - The
second reflection panel 32 is formed into a rectangular shape extended in the Z-axis direction, and has a relatively shorter width in the Y-axis direction compared with a width of thefirst reflection panel 31 in the Y-axis direction. An end of a shorter side of thesecond reflection panel 32 is placed at the first direction X1 side of thefirst lighting source 41. Thesecond reflection panel 32 is placed within thecase 2 so that thesecond reflection panel 32 is inclined toward the first direction X1 as a distance from thefirst lighting source 41 increases. Thesecond reflection panel 32 is placed within thecase 2 so that the end of the shorter side of thesecond reflection panel 32 is placed closer in the Y-axis direction to thefirst lighting source 41 compared with the other end of the shorter side of thesecond reflection panel 32. Thereflection surface 311 of thefirst reflection panel 31 and areflection surface 321 of thesecond reflection panel 32 are placed to face to each other and reflect the light emitted from thefirst lighting source 41 to thefirst panel 22. - The
third reflection panel 33 is formed into a rectangular shape extended in the Z-axis direction. An end of a shorter side of thethird reflection panel 33 is placed at the second direction X2 of thesecond lighting source 42. Thethird reflection panel 33 is placed to be inclined toward the second direction X2 as a distance from thesecond lighting source 42 increases. Thethird reflection panel 33 is placed within thecase 2 so that the end of the shorter side of thethird reflection panel 33 is placed closer in the Y-axis direction to thesecond lighting source 42 compared with the other end of the shorter side of thethird reflection panel 33. - The
fourth reflection panel 34 is formed into a rectangular shape extended in the Z-axis direction and has a width in the Y-axis direction longer than a width of thethird reflection panel 33 in the Y-axis direction. An end of a shorter side of thefourth reflection panel 34 is placed at the first direction X1 side of thesecond lighting source 42. Thefourth reflection panel 34 is placed to be inclined toward the first direction X1 as a distance from thesecond lighting source 42 increases. Thefourth reflection panel 34 is placed within thecase 2 so that the end of the shorter side of thefourth reflection panel 34 is placed closer in the Y-axis direction to thesecond lighting source 42 compared with the other end of the shorter side of the fourreflection panel 34. Thereflection surface 331 of thethird reflection panel 33 and thereflection surface 341 of thefourth reflection panel 34 are faced to each other, and thereflection surface 331 and thereflection surface 341 reflect, to thefirst panel 22, the light emitted from thelighting source 42. In thereflection surface 341 of thefourth reflection panel 34, for example, an angle against thereflection surface 331 of thethird reflection panel 33 and a length of a width in the Y-axis direction of thereflection surface 341 of thefourth reflection panel 34 are adjusted so that the emitted light reaches, through thefirst panel 22, as far as possible in the second direction X2. - The first
light adjustment panel 35 is formed into a rectangular shape extended in the Z-axis direction. The both surfaces of the firstlight adjustment panel 35 are made to shieldingsurfaces first panel 22, the shieldingsurface 351 is colored with black to absorb the light as a light absorbing surface. The shieldingsurface 352 is colored with white to progress the higher reflectance compared with the shieldingsurface 351. The firstlight adjustment panel 35 is placed between thereflection surface 311 of thefirst reflection panel 31 and thereflection surface 321 of thesecond reflection panel 32. The firstlight adjustment panel 35 is placed near the first direction X1 side of the middle in the X-axis direction of thefirst lighting source 41. The firstlight adjustment panel 35 is placed within thecase 2 so that the shieldingsurface 351 is faced up to thefirst lighting source 41. The firstlight adjustment panel 35 is placed so that an end of a shorter side of the firstlight adjustment panel 35 is located at the first direction Y1 side which is closer than an end in the second direction Y2 of thesecond reflection panel 32. The firstlight adjustment panel 35 is place to incline toward the second direction X2 as a distance from thefirst lighting source 41 increases. The firstlight adjustment panel 35 is placed within thecase 2 so that the end of the shorter side of the firstlight adjustment panel 35 is placed closer in the Y-axis direction to thefirst lighting source 41 compared with the other end of the shorter side of the firstlight adjustment panel 35. - The second
light adjustment panel 36 is formed into a rectangular shape extended in the Z-axis direction. The both surface of the secondlight adjustment panel 36 are made to shieldingsurfaces first panel 22, the shieldingsurface 361 is colored with black to absorb the light as a light absorbing surface. The shieldingsurface 362 is colored with white to progress the higher reflectance compared with the shieldingsurface 361. The secondlight adjustment panel 36 is placed between thereflection surface 331 of thethird reflection panel 33 and thereflection surface 341 of thefourth reflection panel 34. The secondlight adjustment panel 36 is placed near the first direction X1 side of the middle in the X-axis direction of thesecond lighting source 42. The secondlight adjustment panel 36 is placed within thecase 2 so that the shieldingsurface 361 is faced up to thesecond lighting source 42. The secondlight adjustment panel 36 is placed so that an end of a shorter side of the secondlight adjustment panel 36 is located closer to the first direction Y1 side than an end in the second direction Y2 of thefourth reflection panel 34. The secondlight adjustment panel 36 is placed to incline toward the second direction X2 as a distance from thesecond lighting source 42 increases. The secondlight adjustment panel 36 is placed within thecase 2 so that the end of the shorter side of the secondlight adjustment panel 36 is placed closer in the Y-axis direction to thesecond lighting source 42 compared with the other end of the shorter side of the secondlight adjustment panel 36. - The shielding
panel 37 is formed into a rectangular shape extended in the Z-axis direction and placed between thesecond reflection panel 32 and thethird reflection panel 33. The shieldingpanel 37 includes a shieldingsurface 371 shielding a part of the light emitted from thefirst lighting source 41 and ashielding surface 372 shielding a part of the light emitted from thesecond lighting source 42 at each of both surfaces respectably. The shielding surfaces 371 and 372 of the shieldingpanel 37 are colored with black to absorb the light as light absorbing surfaces. - Each of a pair of
side panels 38 of thelight adjuster 3, as shown inFIG. 5 ,FIG. 6A , andFIG. 6B , includes a pair of holdingparts 381 formed into a rectangle board shape and a mountingpart 382 formed for being bent perpendicular at the first direction Z1 or the second direction Z2 from the second direction Y2 side of each of the pair of holdingunits 381. Each of the pair of holdingunits 381, as shown inFIG. 3 andFIG. 5 , includes slits to pass through and hold the each of both edges in the Z-axis direction of thefirst reflection panel 31, thesecond reflection panel 32, thethird reflection panel 33, the fourth reflection panel 34 (refer toFIG. 1 andFIG. 2 ). Also, each of the pair of holdingparts 381 includes slits to pass through and hold the each of both edges in the Z-axis direction of the firstlight adjustment panel 35, the secondlight adjustment panel 36, and the shielding panel 37 (refer toFIG. 1 andFIG. 2 ). Each of the pair of the holdingparts 381 is formed into a reflection surface so that surfaces faced to each other in the Z-axis direction reflect the light emitted from thelighting source 4. The mountingpart 382 is assembled to a surface of the first direction Y1 side of the mountingpanel 24 with screws. - As shown in
FIG. 6A andFIG. 6B , themiddle panel 39 is formed into a rectangle board shape, and includes a pair of mountingchips 391 that both edges of themiddle panel 39 in the X-axis direction is bent perpendicular to the first direction Z1. Each of the pair of mountingchips 391 is assembled to a surface of the first direction Y1 side of the mountingpanel 24 with screws. Themiddle panel 39 is placed between twofirst lighting sources 41 along to the Z-axis direction and between twosecond lighting sources 42 along to the Z-axis direction. The both surfaces of themiddle panel 39 are formed into reflection surfaces. Themiddle panel 39 has slits to pass through thefirst reflection panel 31, thesecond reflection panel 32, thethird reflection panel 33, thefourth reflection panel 34, the firstlight adjustment panel 35, the secondlight adjustment panel 36, and the shieldingpanel 37. - Each of
plural heat sinks 5, as shown inFIG. 3 , includes a base 51 formed into a rectangle board shape by a metal such as an aluminum, andplural radiating fins 52 formed into a rectangle board shape at a surface of the second direction Y2 side of thebase 51. When thebase 51 is mounted to the surface of the second direction Y2 side of the mountingpanel 24, each of theplural heat sinks 5 dissipates heat generated from thelighting source 4. - The
stand holder 6, as shown inFIG. 1 , includes abox 61 containing such as apower source 611 and acontroller 612, and a pair of supportingpanels 62. Thepower source 611 converts from electrical power supplied from a commercial power supply to electrical power for supplying to thelighting source 4. Thecontroller 612 dims and arranges colors by adjusting electrical power supplying to theLEDs panels 62 is connected to the both edges of thebox 61 in the Z-axis direction and holds thecase 2 being able to change an angle of thecase 2 withknob bolts 63. - Note that, when the
lighting device 1 is installed at afloor 101, front, rear, left, right, top, and bottom are defined inFIG. 1 . The Z-axis direction shown inFIG. 1 is defined as the right-left direction, the first direction Z1 points to the right, and the second direction Z2 points to the left. Besides, a top-and-bottom direction and a front-and-rear directions are defined when thelighting device 1 is installed at thefloor 101 inFIG. 7 toFIG. 9 . - Incidentally, the
lighting device 1 of the present embodiment, as shown inFIG. 7 , is installed on thefloor 101 as an installation surface on which a wall surface (illuminated surface of the target 10) 100 is installed. Thelighting device 1 is installed on thefloor 101 so that the Y-axis direction, which is same as optical axes OA1 and OA2, crosses to a standing direction (the top-and-bottom direction) of thewall surface 100. In other words, the front-and-rear direction's distance between thesecond lighting source 42 andwall surface 100 is shorter than the front-and-rear direction's distance between thefirst lighting source 41 and thewall surface 100. Note that, thelighting device 1 may be installed at a predetermined location in the front-and-rear direction, and the angle of the optical axes OA1 and OA2 against thefloor 101 may be changed by usingknob bolts 63. The standing direction is a direction which is along to the illuminated surface and crossing to the installation surface of thelighting device 1. In other words, the standing direction is the direction which is along to thewall surface 100 and crossing to thefloor 101 when thelighting device 1 is installed at thefloor 101. Moreover, when thelighting device 1 is installed at the ceiling, the standing direction is a direction which is along to thewall surface 100 and crossing to the ceiling. - Note that, as shown in
FIG. 7 , a dashed line Il represents an illumination curve Il when a lighting device includes none of the firstlight adjustment panel 35, the secondlight adjustment panel 36, or the shielding panel 37 (a comparative example). A distance between thewall surface 100 and the illumination curve I1 represents an intensity of illuminance (an illuminance D1). As shown inFIG. 7 , a solid line I2 represents an illumination curve I2 when thelighting device 1 includes the firstlight adjustment panel 35, the secondlight adjustment panel 36, and the shielding panel 37 (thelighting device 1 of the present embodiment). The distance between thewall surface 100 and the illumination curve I2 represents an intensity of illuminance (an illuminance D2). - Here, paths of the light emitted from the
first lighting source 41 and thesecond lighting source 42 are described.FIG. 8 shows the paths of the light (of the present embodiment) when thelighting device 1 includes the firstlight adjustment panel 35, the secondlight adjustment panel 36, and the shieldingpanel 37. As shown inFIG. 8 , the shieldingsurface 351 of the firstlight adjustment panel 35 and the shieldingsurface 361 of the secondlight adjustment panel 36 are formed to have a low reflectance and absorb the light emitted from thelighting source 4. Besides, the shieldingsurface 352 of the firstlight adjustment panel 35 and the shieldingsurface 362 of the secondlight adjustment panel 36 are formed to have a high reflectance and reflect the light emitted from thelighting source 4.FIG. 9 shows paths of the light (of the comparative example) when the lighting device includes none of the firstlight adjustment panel 35, the secondlight adjustment panel 36, or the shieldingpanel 37. As shown inFIG. 8 andFIG. 9 , the optical axis OA1 shows an optical axis of thelighting part 410 of thefirst lighting source 41, and the optical axis OA2 shows an optical axis of thelighting part 420 of thesecond lighting source 42. - As shown in
FIG. 8 , along an optical path OP1, the light traveled to the direction inclining upward and pointing to the firstlight adjustment panel 35 from theLEDs 412 of thefirst lighting source 41 hits the shieldingsurface 351 of the firstlight adjustment panel 35, and is shielded. Along an optical path OP2, the light traveled to the front direction from theLEDs 412 of thefirst lighting source 41 is reflected by thereflection surface 321 of thesecond reflection panel 32, reflected by the shieldingsurface 352 of the firstlight adjustment panel 35, and travels toward thefirst panel 22. Along an optical path OP3, the light traveled to the direction inclining frontward and pointing to the shieldingpanel 37 from theLEDs 412 of thefirst lighting source 41 is shielded by the shieldingsurface 371 of the shieldingpanel 37. - Along an optical path OP4, the light traveled to the direction inclining rearward and pointing to the
first reflection panel 31 from theLEDs 412 of thefirst lighting source 41 is reflected by thereflection surface 311 of thefirst reflection panel 31 and travels toward thefirst panel 22. Along an optical path OP5, the light traveled to the direction inclining upward from theLEDs 412 of thefirst lighting source 41 travels upward. - Along an optical path OP6, the light traveled to the direction inclining upward and pointing to the second
light adjustment panel 36 from theLEDs 422 of thesecond lighting source 42 hits the shieldingsurface 361 of the secondlight adjustment panel 36, and is shielded. Along an optical path OP7, the light traveled to the front direction from theLEDs 422 of thesecond lighting source 42 is reflected by thereflection surface 341 of thefourth reflection panel 34, reflected by the shieldingsurface 362 of the secondlight adjustment panel 36, and travels toward thefirst panel 22. Along an optical path OP8, the light traveled to the direction inclining upward and pointing to thethird reflection panel 33 from theLEDs 422 of thesecond lighting source 42 is reflected by thereflection surface 331 of thethird reflection panel 33, and shielded by the shieldingsurface 372 of the shieldingpanel 37. Along an optical path OP9, the light traveled to the direction inclining rearward and pointing to thethird reflection panel 33 from theLEDs 422 of thesecond lighting source 42 is reflected by thereflection surface 331 of thethird reflection panel 33 and travels toward thefirst panel 22. Along an optical path OP10, the light traveled upward from theLEDs 422 of thesecond lighting source 42 travels upward. - In a comparative example as shown in
FIG. 9 , comparing with the paths of the light as shown inFIG. 8 , there exist more optical paths of the light emitted to the front side of the optical axes OA1 and OA2 fromplural LEDs 412 of thefirst lighting source 41. Besides, the intensity of an illumination at a place closer to thefirst lighting source 41 of thewall surface 100 is stronger by the light emitted from thefirst lighting source 41. Moreover, in the comparative example, comparing with the paths of the light as shown inFIG. 8 , there exist more the optical paths of the light emitted to front side of the optical axis OA2 from theplural LEDs 422 of thesecond lighting source 42. Further, the intensity of an illumination at a place closer to thesecond lighting source 42 of thewall surface 100 is stronger by the light emitted from thesecond lighting source 42. In other words, as the illumination curve I1 of thewall surface 100 by thefirst lighting source 41 and thesecond lighting source 42 in the comparative example, the intensity of an illumination D1 at a lower part of thewall surface 100 is more likely to be stronger and the intensity of an illumination D1 at higher part of thewall surface 100 is more likely to be weaker (refer toFIG. 7 ). - Accordingly, in the
lighting device 1 of the present embodiment, the shieldingsurface 351 of the firstlight adjustment panel 35, as shown inFIG. 8 , shields a part of the light emitted from theplural LEDs 412 of thefirst lighting source 41 to the front side (the first end side) of the optical axis OA1. The shieldingsurface 361 of the secondlight adjustment panel 36 shields a part of the light emitted from theplural LEDs 422 of thesecond lighting source 42 to the front side (the first end side) of the optical axis OA2. Besides, the shielding surfaces 371 and 372 of the shieldingpanel 37 shield a part of the light emitted to a lower part of thewall surface 100. - Moreover, the shielding
surface 352 of the firstlight adjustment panel 35 and the shieldingsurface 362 of the secondlight adjustment panel 36 reflect a part of the light emitted from thefirst lighting source 41 and thesecond lighting source 42, and thus, when thelighting device 1 emits the light to thewall surface 100, an irregular illumination on thewall surface 100 can be reduced. In other words, the shieldingsurface 352 of the firstlight adjustment panel 35 and the shieldingsurface 362 of the secondlight adjustment panel 36 are configured to reflect a part of the light emitted from thefirst lighting source 41 and thesecond lighting source 42. A part of the light to illuminating the wall surface is reflected by the shieldingsurface 352 of the firstlight adjustment panel 35 and the shieldingsurface 362 of the secondlight adjustment panel 36. Therefore, an irregular illumination of thewall surface 100 can be reduced. - As shown in the
illumination curve 12 of thelighting device 1 of the present embodiment, the intensity of the illumination D2 of a lower side of the wall surface 100 (floor 101 side) is reduced by the shieldingsurface 351 of the firstlight adjustment panel 35, the shieldingsurface 361 of the secondlight adjustment panel 36, and the shieldingpanel 37. Besides, thelighting device 1 emits light to thewall surface 100 so that an illuminance distribution of thewall surface 100 in the top-and-bottom direction is more uniform by the shieldingsurface 352 of the firstlight adjustment panel 35 and the shieldingsurface 362 of the secondlight adjustment panel 36. In other words, the intensity of the illumination D2 of the light emitted to thewall surface 100 becomes more uniform with the shieldingsurface 352 of the firstlight adjustment panel 35 and the shieldingsurface 362 of the secondlight adjustment panel 36. Moreover, using theknob bolts 63, the angle of thecase 2 can be changed and thelighting device 1 is able to emit light in the top-and-bottom direction to a far place of thewall surface 100, even if thelighting device 1 may be installed at a place different from the installation place shown inFIG. 7 in the front-and-rear direction. - Note that, the
lighting device 1 of the present embodiment may be installed at a ceiling instead of thefloor 101 by, for example, being suspended. Thelighting source 4 may include only onefirst lighting source 41 and only onesecond lighting source 42. Further, thelighting source 4 may include three or morefirst lighting sources 41 and three or more second lighting sources 42. Besides, shapes and constitutions of thecircuit board 411 of thefirst lighting source 41 and thecircuit board 421 of thesecond lighting source 42 are not limited to those of the present embodiment. - Widths of the top-and-bottom direction, shapes, and inclination angles of the
first reflection panel 31, thesecond reflection panel 32, thethird reflection panel 33, and thefourth reflection panel 34 are not limited to those of the present embodiment. Also, widths of the top-and-bottom direction, shapes, and inclination angles of the firstlight adjustment panel 35, the secondlight adjustment panel 36, and the shieldingpanel 37 are not limited to those of the present embodiment. - The manner of settings of the reflectance of the shielding surfaces 351 and 352 of the first
light adjustment panel 35 and the shieldingsurface light adjustment panel 36 are not limited to the manners of setting of the reflectance of the present embodiment. Thelighting device 1 preferably includes the firstlight adjustment panel 35 in which the reflectance of the shielding surfaces 351 and 352 are set appropriately in accordance with a place and an environment of the installation. Thelighting device 1 preferably includes the secondlight adjustment panel 36 in which the reflectance of the shielding surfaces 361 and 362 are adjusted appropriately in accordance with a place and an environment of the installation. The reflectance of the shielding surfaces 351 and 352 of the firstlight adjustment panel 35 and the shielding surfaces 361 and 362 of the secondlight adjustment panel 36 are not only adjusted by color of surfaces, but may be adjusted by processing the surfaces, such as a mirror surface processing. In additionally, the reflectance of the shielding surfaces 351 and 352 of the firstlight adjustment panel 35 and the shielding surfaces 361 and 362 of the secondlight adjustment panel 36 may be adjusted by processing the surfaces, such as a mirror surface processing, instead of being adjusted by color of surfaces. - The manners of adjustment of the reflectance of the shielding surfaces 371 and 372 of the shielding
panel 37 are not limited to the manners of adjustment of the reflectance of the present embodiment. Thelighting device 1 preferably includes the shieldingpanel 37 in which the reflectance of the shielding surfaces 371 and 372 are adjusted appropriately in accordance with a place and an environment of the installation. The reflectance of the shielding surfaces 371 and 372 of the shieldingpanel 37 are not only adjusted by color of surfaces, but may be adjusted by processing the surfaces, such as a mirror surface processing. In additionally, the reflectance of the shielding surfaces 371 and 372 of the shieldingpanel 37 may be adjusted by processing the surfaces, such as a mirror surface processing, instead of being adjusted by color of surfaces. - The materials and shapes of the
heat sinks 5 are not limited to those of the present embodiment. - The
lighting device 1 of the present embodiment emits light to the illuminated surface (wall surface 100) of thetarget 10 standing at the installation surface (floor 101) on which thelighting device 1 is installed. Thelighting device 1 includes: thelighting source 4; thecase 2 containing thelighting source 4; and thelight adjuster 3 contained in thecase 2 and adjusting a path of light emitted from thelighting source 4. Thelighting source 4 includes thefirst lighting source 41 and thesecond lighting source 42 aligned along the predetermined direction (X direction) in thecase 2. Thesecond lighting source 42 is placed at a side of thefirst lighting source 41 at the predetermined side (X 1 side) of the predetermined direction (X direction). Thelight adjuster 3 includes thefirst reflection panel 31 and thesecond reflection panel 32 reflecting light emitted from thefirst lighting source 41, and thethird reflection panel 33 and thefourth reflection panel 34 reflecting light emitted from thesecond lighting source 42. Thelight adjuster 3 further includes the firstlight adjustment panel 35 placed between thefirst reflection panel 31 and thesecond reflection panel 32, and the secondlight adjustment panel 36 placed between thethird reflection panel 33 and thefourth reflection panel 34. Each of thereflection surface 311 of thefirst reflection panel 31 and thereflection surface 321 of thesecond reflection panel 32 are located facing each other in the predetermined direction (X direction). Each of thereflection surface 331 of thethird reflection panel 33 and thereflection surface 341 of thefourth reflection panel 34 are located facing each other in the predetermined direction (X direction). The firstlight adjustment panel 35 is placed between thereflection surface 311 of thefirst reflection panel 31 and thereflection surface 321 of thesecond reflection panel 32, and shields a part of the light emitted from thefirst lighting source 41 to the predetermined side (front side) of an optical axis OA1 of thefirst lighting source 41. The secondlight adjustment panel 36 is placed between thereflection surface 331 of thethird reflection panel 33 and thereflection surface 341 of thefourth reflection panel 34, and shields a part of the light emitted from thesecond lighting source 42 to the predetermined side of an optical axis OA2 of thesecond lighting source 42. - In other words, the
lighting device 1 of the present embodiment emits light to the illuminated surface (wall surface) 100 of thetarget 10 standing at the installation surface (floor) 101 on which thelighting device 1 is installed. Thelighting device 1 includes: thelighting source 4; thecase 2 accommodating thelighting source 4; and thelight adjuster 3 accommodated in thecase 2 and adjusting a path of light emitted from thelighting source 4. Thelighting source 4 includes thefirst lighting source 41 and thesecond lighting source 42 aligned along the predetermined direction (X-axis direction) in thecase 2. The predetermined direction is the direction toward the second end of thecase 2 from the first end of thecase 2, and the first end (the first direction) X1 side is a side closer to the first end than the second end. Thesecond lighting source 42 is placed at the first end (the first direction) X1 side of thefirst lighting source 41 in the predetermined direction (X-axis direction). Thelight adjuster 3 includes thefirst reflection panel 31 and thesecond reflection panel 32 both reflecting light emitted from thefirst lighting source 41, and thethird reflection panel 33 and thefourth reflection panel 34 both reflecting light emitted from thesecond lighting source 42. Thelight adjuster 3 further includes the firstlight adjustment panel 35 placed between thefirst reflection panel 31 and thesecond reflection panel 32, and the secondlight adjustment panel 36 placed between thethird reflection panel 33 and thefourth reflection panel 34. Thereflection surface 311 of thefirst reflection panel 31 and thereflection surface 321 of thesecond reflection panel 32 face each other in the predetermined direction (X-axis direction). Thereflection surface 331 of thethird reflection panel 33 and thereflection surface 341 of thefourth reflection panel 34 face each other in the predetermined direction (X-axis direction). The firstlight adjustment panel 35 is placed between thereflection surface 311 of thefirst reflection panel 31 and thereflection surface 321 of thesecond reflection panel 32, and shields a part of the light, which is emitted from thefirst lighting source 41 to the first end (the first direction) X1 side of the optical axis OA1 of thefirst lighting source 41. The secondlight adjustment panel 36 is placed between thereflection surface 331 of thethird reflection panel 33 and thereflection surface 341 of thefourth reflection panel 34, and shields a part of the light, which is emitted from thesecond lighting source 42 to the first end (the first direction) X1 side of the optical axis OA2 of thesecond lighting source 42. - The
lighting device 1 of the present embodiment is configured as described above, and therefore an irregular illumination to the illuminated surface (wall surface) 100 of thetarget 10 can be reduced. - In the
lighting device 1 of the present embodiment, both surfaces of the firstlight adjustment panel 35 preferably are shieldingsurfaces light adjustment panel 36 preferably are shieldingsurfaces - When the
lighting device 1 of the present embodiment is configured as described above, thelighting device 1 can reduce the irregular illumination in thewall surface 100 while decreasing the light emitted to the part of thewall surface 100 closer to thefloor 101. - In the
lighting device 1 of the present embodiment, the firstlight adjustment panel 35 is preferably placed so that the first surface (shielding surface) 351 faces to thefirst lighting source 41. Thefirst surface 351 of the firstlight adjustment panel 35 is preferably a light absorbing surface having the higher absorptance than the second surface (shielding surface) 352, which is opposite to the first surface, of the firstlight adjustment panel 35. Thesecond surface 352 of the firstlight adjustment panel 35 is preferably the light reflecting surface having the higher reflectance than thefirst surface 351 of the firstlight adjustment panel 35. The secondlight adjustment panel 36 is preferably placed so that the first surface (shielding surface) 361 faces to thesecond lighting source 42. Thefirst surface 361 of the secondlight adjustment panel 36 is the light absorbing surface having the higher absorptance than the second surface (shielding surface) 362, which is opposite to the first surface, of the secondlight adjustment panel 36. Thesecond surface 362 of the secondlight adjustment panel 36 is preferably the light reflecting surface having the higher reflectance than thefirst surface 361 of the secondlight adjustment panel 36. - The
lighting device 1 of the present embodiment preferably further includes the shieldingpanel 37 placed between thesecond reflection panel 32 and thethird reflection panel 33. Both surfaces of the surfaces of the shieldingpanel 37 are the shieldingsurfaces - When the
lighting device 1 of the present embodiment is configured as described above, thelighting device 1 can decrease the light illuminating the part of thewall surface 100 closer to thefloor 101. - In the
lighting device 1 of the present embodiment, the predetermined direction (X direction) is preferably a direction that crosses to the standing-direction (top-and-bottom direction) of the target 10 (wall surface 100). - In other words, in the
lighting device 1 of the present embodiment, the predetermined direction (X-axis direction) is preferably a direction that crosses to the standing-direction (top-and-bottom direction) of thetarget 10 which is a direction along to the illuminated surface (wall surface) 100 and crossing to the installation surface (floor) 101 when thelighting device 1 is installed at the installation surface (floor) 101. - When the
lighting device 1 of the present embodiment is configured as described above, thelighting device 1 can reduce the irregular illuminations of thewall surface 100. - In the
lighting device 1 of the present embodiment, each of thefirst lighting source 41 and thesecond lighting source 42 preferably includesplural LEDs - When the
lighting device 1 of the present embodiment is configured as described above, thelighting device 1 can emit the light with desired colors to thewall surface 100. - The
lighting device 1 of the present embodiment preferable further includes thepower source 611 for supplying electrical power to thelighting source 4, and thestand holder 6 containing thepower source 611 and pivotally holding thecase 2. - When the
lighting device 1 of the present embodiment is configured as described above, thelighting device 1 can emits the light to the place far along to thewall surface 100 from the installed place. - While the foregoing has described what are considered to be the best mode and/or other examples, it is understood that various modifications may be made therein and that the subject matter disclosed herein may be implemented in various forms and examples, and that they may be applied in numerous applications, only some of which have been described herein. It is intended by the following claims to claim any and all modifications and variations that fall within the true scope of the present teachings.
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015120363A JP6583774B2 (en) | 2015-06-15 | 2015-06-15 | Lighting device |
JP2015-120363 | 2015-06-15 |
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CN109238238A (en) * | 2018-09-05 | 2019-01-18 | 浙江大丰实业股份有限公司 | Stage performer automatic station-keeping system |
US11428387B2 (en) * | 2019-12-20 | 2022-08-30 | Xiamen Leedarson Lighting Co., Ltd | Lighting apparatus |
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KR101804956B1 (en) | 2017-05-23 | 2017-12-06 | 주식회사 명신전자 | Led lamp apparatus having a light block capable of automatic angle control |
KR102228588B1 (en) * | 2020-08-13 | 2021-03-15 | 신두식 | Wall type light assembly |
KR102228589B1 (en) * | 2020-08-13 | 2021-03-15 | 신두식 | Security light assembly |
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US11428387B2 (en) * | 2019-12-20 | 2022-08-30 | Xiamen Leedarson Lighting Co., Ltd | Lighting apparatus |
Also Published As
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DE102016110792A1 (en) | 2016-12-15 |
JP2017004894A (en) | 2017-01-05 |
JP6583774B2 (en) | 2019-10-02 |
US9903568B2 (en) | 2018-02-27 |
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